Air filter



July 5, 1932. c. WHITTAKER AIR FILTER Filed Sept, 6, 1930 INVENTOR J ATTORNEY I Patented July 5, 1932 HOUSE ELECTRIC & MANUFACTURI COMPANY, A CORPORATION; or 'rnnnsf'srng VANIA CHARLES c. WHITTAKER, or rerrrsnunen, maasvivmn,z-i siemn rolwns'ri'iiqL j Application filed September 6,,1 930. .;"Serial Ito, I

My invention relates to air filters or cleaners.

When the airwhich is used for ventilating electrical apparatus iskept relatively free from dirt and suspended moisture, the maxi-' mum life of the insulation is obtained. It is,

therefore, necessary to pass the air through a filter before it is taken into the ventilating system. y v I J n An object of my invention, generally stated, is to provide an air filterwhich shall be simple and efiicient in operation and which may bereadily and economically manufactured. I e

A more specific object of my invention is to prevent suspended moisture frompassing through an air filter and entering a ventilatingsystem. i M,

For a fuller understandingof the nature and objects of the invention, reference may be had to the following detaileddescription taken in conjunction with the accompanying drawing in which:

Figure 1 isa view, in front elevatioin o'f an air filter constructed in accordance with my invention, showing the air filter mounted on the side of a locomotive cab;

Fig. 2 is a view, partly in side elevation and partly in section, of the air filter shown in Fig. 1, and 7 Figs. 3 and 4 are enlarged sectional views showing details of the construction.

As shown in the drawing, a rectangular opening 9 is provided in a side sheet 10 of a locomotive cab. The side sheet 10 may be at the point farthest from the road-bed in order that the air which enters the filter shall be relatively clean.

It will be observed that the opening is surrounded by a gutter 12 which catches the Water that runs down the side of the cab durl'ocomotivecab. It' wi-ll be observ'ed that"the"screen. 16 is m' ounted' below lthe b'aflle plate 13 in such manner that the'air flows through the screen in a horizontal direction, as indicated by the ing a rainstorm, and "prevents .it from entering the ventilating system. 1 The gutter 12 may befconstructed of; strips'of metal of a'. J shape which are" mounted on the'sidesheet 10 around the'opening 9'.

the formof rain or dense fog; that-may" enter With a view to collecting any moisture, in

through} the opening f 9,1 the bafile sheet 13 is placed 7 directly. opposite the opening 'in such i'nan'ner; that thewater' particles are thrown against lhefwateiflwhich collects on thebafile sheet drains to'the bottom where it is caught by a-gutter 1 4, from which it is drained and thus prevented through the 'air filter.

. In'orderthatthef gutter 14 shall notinterfere. with the air stream flowing. downward,

it. is offset, or" curved backward, as shown inthe drawing, the front edge 15 being in'line ,Afilter screen 16 is provided forremoving theparticl'es o'fdirt which are carried through the opening 9' by: the air stream. The screen 16 may be.v constructed of any material suitable for this purpose.- However, it has been.

found that fa'screen composed of severallay- 'ers'of expanded metal, which'has been soaked in- 'ahavy" :oil: and drained, is satisfactory.

The's'heet's ofgmetal are soshaped and dis posed'that thedirection of theflow of-the air is 'belng continually changed as it passes and thescreenr epla'ced in the filter. When it is desired to removethe screen 16, 9. plate '17,"to"which the screen is welded, may be re- 'mo'vedfby loosening bolts 18 (Fig. 4') and frompassing on through the screen. The particles ofdirt'are the screenpdropped'through thefioor of the arrows in Fig. 2. The a'reaof the screen 16 ice ' ity, thus preventing the air from blowing the in the foregoing manner does not decrease the strength of the side sheet lOuof th 1 motive cab. The areaofthe' opening- 9 isre'lativelysmal-l, also it is located above-a reinforcing bar 22in such mannerthatgit isnot necessary-tenet the barfto; provide air-opening for the airteenter the-filter. V

Since numerous changes; may be made in theabove-described construction, and different embodimentsfof the inventionniay be made withoutdeparting from the spirit and scope: thereof, is intended that. all matter contained in thee-foregoing; description, or shown: in the accompanying drawing, shall be; interpreted as illustrative. and. not in a limiting sense.

I claim as my invention t -1'. An air cleaner comprising a filter screen, asup-porting structure for the screen, agutter surrounding an opening through; which: air enters the cleaner, a: bafiie plate disposed op"- posite the opening to'collect particles of moisa ture that enter through the opening, and

means attached to the tame plate for catching; the moisturelthat collects 011%.th. bafile plate to prevent itfrom entering the filter 2: An a r cleaner comprising afilterscreen, aim-supporting structure forthe'screen, a gutter' surrounding an openin through which agutter formed on the 'bottomjof the battle plate tog catch the: moisture. that. collects on .the baille-plate to prevent it from-entering 3. An air; cleaner comprising a filter'screen, a supportingstructurefor thescreen, a; gutter surrounding an opening through. which: air

enters; the cleaner,a-baifiefplate disposed op .posite the:opening-tocollect particlesofmois- I thexbafile plate. .toprevent obstructing the air fiow'past the gutter.-

jture that enter through-theopening, and a gutter disposed 'atthebottom of the baffle plate to catch the moisture that collects on the bafie plate toprevent it from 'enterin'gthefilterscreen, said? gutter being so-ofis'etthatthe edge-oithe gutteris-substantially im line with r T 4% In-an a-i-r=cleaner;. in -combinationeaver- =tifially; mounted filter. screntra supporting v.staiuct-ure'for-the, screen, a gutter surrounding through holes 21, provid 1 'line with the baflle plateto prevent an opening through which air enters the cleaner, and a vertical baffle plate disposed opposite the opening and above the filter screen for directing the air through the filter screen, the area of the screen being larger than the area ofv the opening in order that 'thevelocity of the air thro'ughthe screen shall be less than through the opening.

5. An air cleaner comprising a filter screen,

"a supporting structure for the screen,a gutter surrounding an opening through which air enters the cleaner, a vertical ba'file "plate disposed opposite the'opening to direct the airthrough the filter screen and to collect particles 'ofmoist-ur that enter through the opening, vand a gutter attached to the lower edge of the baflie plateto catch the moisture that collects on-the. baffle plate to prevent it from. entering the filter screen, the ,edgeof said gutter-being substantially in line with the bafii'e plate to permit air to'flowf readily past the'gutter. V i I i i 6. air cleaner comprising a filter screen, a supporting" structurefor the screen,a' gutter surrounding anopening through which air entersthe'cleaner, a vertical baflie'plate disposed 'oppositerthe-opening and above the filter screen to direct-the airthrough the screen and 'to collect moisture that enters through the opening, and a gutter formed on the lower edgejof the baffle plate toprevent themoisture that collects on the battle plate from entering the filter screen, said'gutter being so offset that its edge is substantially in in the airflow past the gutter.

ntestimony whereof I have hereunto subscrlbed my name this 22nd day of August,

oHa-nnns c. WHITTAKER.

air enters the cleaner, a ha e plate disposed opposite the opening to collect particles of moisture, that enter throughthe.opening,and

obstruct- 1 

